Hi, I am new to here so hopefully in the right place! I have a 2001 renault trafic van and it refuses to start when it's cold outside. I have had a leak back test done and the results were fine, also had new glow plugs and glow plug relay fitted. It takes about half an hour plus a bit of easy start to get going and once it's finally started I have to let it run for 10 mins before I get any power. Seems to be getting harder every morning to start and I'm at a dead end and don't know what to do. Thanks